Whats the square root of 216

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

Somone me i want to know what 18 hours out of 24 hours in a fraction